@Stella412 I would not make the assumption that they're going to cover any costs beyond what they offered today: that is, a refund for the remainder of your current stay plus transport and one night's hotel stay. You're probably on your own after this unless they state otherwise. Making up the difference on a replacement booking is not something I've ever heard of them doing.
I hesitate to say this without knowing the cause of this abrupt action, but if you prefer to make arrangements with the current host outside of Airbnb, you are free to do so at your own risk, on your own terms. But naturally they will have no responsibility or liability connected with such an arrangement.